Window-screen.



v JOSEPH M. lVICGRATI-I ANI) JOI-IN T. LANE, OF SAN FRANCISCO, CALIFORNIA.

WINDOW-SCREEN.

Specification of Letters Patent.

Patented Aug. 7, 1917.

Application filed May 31, 1916. Serial No. 100,889.

To all 'whom t may concern:

Be it known that we, JOSEPH M. MCGRATH and JOHN T. LANE, citizens of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in lVindow-Screens, of which the following is a specification.

The object of the present invention is to provide a window screen which will provide perfect ventilation, which can be readily adjustable as to length, which can be used in all weathers, and with which the curtains will be protected from being soiled by parts of the window screen exposed to dust or rain.

In the accompanying drawing, Figure 1 is a vertical section of a window equipped with our improved window screen, Fig. 2 is a broken top plan view thereof on an enlarged scale; Fig. 3 is a broken horizontal section thereof on the line 3 3 of Fig. 6; Fig. 4 is an end view, Figs. 5 and G are cross sections on the lines and 6-6 of Fig. 3.

On referring to thefdrawing, it will be seen that our improved window screen consists of two sections, an inner window screen section 1 and an outer window screen section 2. Each section comprises an end piece 3, which, for a short distance from the bot tom, has two parallel vertical edges 4 5, the rear edge 4 diverging upwardly from the front edge 5 at an angle of almost 30, as shown at 6, to a level a little lower than the front edge 5, and the top edge having two upwardly sloping portions 7, 8, meeting at an angle of about 120. On each end piece are secured two narrow parallel cleats 9, 10, the width over all of the two cleats being substantially equal to the thickness of the window sash, and the two cleats being spaced from each other to form a groove of sufficient width to conveniently receive the sash weight cord at that end of the window, and, when the window screen is used at the top of the window, to receive the pulley for said sash weight cord. To the rear edge of each end is secured the outer end of a shield plate section 11 or 11', which, conforming to the bent shape of the edge 4 where it diverges upwardly from parallelism with the front edge 5 of the end, is likewise formed with a longitudinally extending bend 12. To the front vertical edge 5 of each end is nailed a metallic binding 13 of the outer end of a screen section 14 or 14', and there is also secured to said front vertical edge 5 and to the upwardly sloping front portion 8 of the top edge, of said end, an end of a cover plate section 16 or 16, said cover plate section being, of course, bent, as shown at 17, to conform to the change from the vertical plane of the front edge 5 to the slightly upwardly inclined plane of the front portion S of' the top edge.

lach screen section 14 or 14, rectangular in form, is bound along all four edges by a metallic binding 1S, and the two screen sections 14 or 14', together with the two cover plate sections 1G, 16 telescope one within the other at the front of the screen, while the two shield sections 11, 11 telescope one within the other at the. rear of the screen. For this purpose, at the front of the screen, the top of the inner screen section 14 is secured within the bottom of the inner cover plate section 16, while the top of the outer screen Section 14 is secured on the outside of the top of the outer cover plate section 1G. Also, the lower edge of the lower binding of the outer screen section, the lower margin of the outer cover plate section, the upper margin of the outer cover plate section, and the upper and lower margins of the outer shield section are formed with grooves 19, 21, 22, 23 respectively in which the corresponding edges of the corresponding inner elements can slide.

The inner end of the outer window screen section 2 is free except for its engagement, as above described, with the inner window screen section 1. But to the inner end of the inner window screen section 1 is nailed a stop plate 24, which resembles in general form the outer end of said inner window screen section, and to the inner terminal portion of the outer window screen section 2, on the cover plate section and lower screen section binding respectively, are secured stops 26, 27, against which, when the window screen is extended to its full extent, the stop 24 is adapted to abut, and thereby prevent the screen sections being entirely separated, which would cause inconvenience in reassembling the same.

The window screen is placed in position either between the bottom of the bottom sash and the bottom of the window, or between the top of the top sash and the top of the window. In the latter case the cleats at the end of the sash sections are arranged on either side of the sash cord and the sash weight pulley. When placed at the bottom of the window, the screen is placed on the outside and the shield extends upwardly inside. Vhen placed at the top of the window, the screen is placed on the inside and the shield extends downwardly on the outside. It is not necessary for the person placing itin the top of the window to reach said top, but it can be placed upon the top of the upper sash when in its lowered position, and, when the sash is raised to the top, the window screen slides up in advance of it. It will be seen that the window screen is securely maintained in the top of the window not only by the pulley st-iles but by the engagement with the sash weight cords and the sash weight pulleys.

By reason of its telescoping action .it is adjustable in length to any size of window.

The above arrangement permits of perfect ventilation of a room, since it allows complete circulation of air, the cool fresh air entering through the lower window screen and the foul hot air escaping through the upper. By both window screens rain and insects are excluded.

Any moisture passing through the screen portion of the window screen is prevented from entering the room by the shield portion thereof and escapes under the lower edge of said screen portion. lVhen used in the top of the window, in which the screen is on the inside and the shield portion on the outer side, it is evident that said shield portion prevents any water reaching the screen portion.

The cover plate is constructed to have the same slope as the lower edge of the lower sash, so that, when the window screen is placed in its lower position, the entrance of water over the top of the window screen between the lower sash and the window screen is eifectually prevented.

An important feature of the window screen is that the shield prevents the lower portion of the curtains from coming in contact with the screen portion and becoming wet if said screen portion is wet on account of rain, and soiled if it is dusty.

l. In a screen for a window having vertically slidable sashes, window screen sections comprising end pieces, each having diverging side edges, and wider at one end than at the other', screen sections, slidably engaging each other, and each secured at one end to the edge of a corresponding end piece, shield plate sections slidably engage ing each other, and each secured at one end to the other edge of the corresponding end piece, and cover plate sections, slidably en-- gaging each other, and each continuous with a screen section, and secured at one end to a portion only of the wider end of the corresponding end piece, and to the adjacent portion of said first named edge.

2. In a screen for a window having vertically slidable sashes, window screen sections comprising end pieces, each having diverging side edges, and wider at one end that at the other, screen sections, slidably engaging each other, and each secured at one end to the edge of a corresponding end piece, shield plate sections slidably engaging each other, and each secured at one end to the other edge of the corresponding end piece, and cover plate sections,slidably engaging each other, and each continuous with a screen section, and secured at one end to a portion only of the wider end of the corresponding end piece, and to the adjacent portion of said first named edge, the screen sections being on opposite sides of the cover plate sections.

JOSEPH M. MCGRATH. JOHN T. LANE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

